Safety razor



'Mar. 27, 1923, 1,449,924

F. WIESE SAFETY RAZOR Filed Sept 2'7 1921 Patented Mar. 27, 1923'.

UNH'ED STA FRANZ WIESE, OF BERLIN, GERMANY.

SAFETY RAZOR.

Application filed September 27, 1921. Serial No. 503,685.

g To all whom it- 'may concern:

Be it known that L'FRANZ WIESE, a citizen of the German Republic, and residing at Berlin, Germany, have invented new an useful Improvements in a Safety Razor (for which I have filed applications in Germany on Feb. 5th, 1920, and June 30th, 1920), of which the-following is a specification.

My present invention relates to a safety razor, and has for its object to provide certain improvements which enable the user to handle the razor automatically in such a. manner that the most effective cutting stroke is invariably obtained.- Another object is a novel method of securing the blade between the guard and the backing. According to my invention the cutting edge is clamped in straight, i. e., without any bending between practically two contact lines Since, however, it is desirable to impart to the blade a curvature to quench those vibrations which are set up during the cutting stroke and which, to a certain extent, affect the cutting effect to the discomfort of the user, I

provide different clamping means at the edge of the blade opposite to the cutting edge, whereby the blade is slightly curved when the two clamping members are caused to approach each other. It is a feature of my invention that no bending strain is exerte upon the middle portion of the blade which is necessarily weakened by the positioning holes; thus, the blade is less liable to break when used with my novel razor. Other objects will become apparent in connection with a description of the details of my novel constructive features, to which I Wlll now proceed, reference being made to the drawing-which formsa part of this specification and in which I have shown an embodiment of my invention by way of example.

Fig. 1 is a sectional elevation, the section being made through the center plane of the handle.

Fig. 2 is a plan view of Fig. 1, and

Fig. 3 shows the novel form of blade.

In order to enable the user to handle the razor in such a manner that the cutting edge of the blade crosses the stroke direction in an acute angle, I impart to the blade at, and to the guard b, and backing 0, the form of a rhomboid (see-.Fig. 3), the smaller sides of which running parallel with the direction of the most effective stroke. Moreover, I incline the handle (i so as to form an acute angle with the guard plate in the direction of the stroke, thus the inclined handle being alsodisposed in parallel relation with d the smaller sides of the rhomboid. This position of the handle all is obtained through a' bending of the screw projection e of the backing c, wvhich screw projection passes throu h the center hole h of the blade a, and through an eccentrically positioned hole within the bulbous projection g of the guard plate 1). While the andle (Z, in a well known manner, is screwed home on the screw projection e, the bulbous structure 9 of the guard plate I) affords the necessary abutment. The backing c is curved in a well known manner so that only its edge portions act upon the blade on when the backing and guard are caused, by means of the handle d, to approach each other. The guard plate I) is formed differently with the object to avoid a bending of the middle portion of the blade at; the side portion 7) of the guard 6 being slightly curved towards the handle d, and the side portion 12 in the opposite direction. former curvature the cutting edge of the blade a is held rigidly and unbent between two contact lines, and in consequence of the latter curvature the blade edge which is opposite to the cutting .edge, is clamped between a hollow structure 6 into which the clamping edge 0 of the backing c enters when the handle-d is screwed home on the screw stem 6 of the backing 0. The co-action of the hollow structure and edge 0 causes a slight curvature of the inoperative blade edge, which has the effect of quenching the undesirable vibrations during the cutting action. This quenching can be varied by the degree to which the handle d is screwed home, thus allowing of adjusting the razor to the special requirements of the user.

The edge portion 12' of the guard 72 is provided with holes 6 for the escape of the lather.

It is a well known fact to all users of razors that the cutting effect of a steel edge diminishes rapidly during a continued use, but may be restored to almost its initial effectiveness on allowing the cutting edge a period of rest. Since with my novel razor, but one cutting edge of the blade can be used at a time, I designate both cutting edges so that the same may be readily distinguished,

States is:

1. A safety razor, comprising, in combination, a blade, a backing with a concave face, a screw threaded .bolt projecting from said concave face of said backing, said bolt being bent so that its end portion forms an acute angle wit-h said backing in a plane that crosses the cutting edge of said blade in an acute angle, a handle adapted to be screwed on said bolt, a guard for said blade, a perforated portion on said guard covering the operative blade edge and being slightly curved towards said handle, and another portion of said guard covering the inoperative blade edge and being slightly curved away from said handle, whereby the blade in the vicinity of the said inoperative edge is slightly bent when clamped between guard and backing, a raised portion on said guard, an opening in said raised portion-and positioned so as to receive said bent screw bolt of said backing, said raised portion of said guard being adapted to form an abutment for said handle.

2. A safety razor, comprising, in combination, a blade of rhomboidal outline, a backing of rhomboidal outline and having a concave face, a screw threaded bolt projecting' from said concave face of said backing, said bolt being bent so that its end portion forms an acute angle with said backing in a plane that crosses the cutting edge of said blade in an acute angle and is in parallel relation to the smaller sides of said rhom boidal' blade, a handle adapted to be screwed on said bolt, a guard portion of said guard covering the inopera-- tive blade edge and being slightly curved away from said handle, whereby the blade in the vicinity of said inoperative blade edge is slightly bent when clamped between guard and backing, a raised portion on said guard, an opening in said raised portion and positioned so as to receive said bent screw bolt of said backing, said raised portion of said guard being adapted to form an abutment for said handle. a

3. A safety razor, comprising, in combination, a blade of rhomboidal outline and having two cutting edges each cutting edge being distinguishably designated, a backing of rhomboidal outline and having a concave face, a screw threaded bolt projecting from said concave face of said backing, said bolt being bent so that its end portion forms an acute anglewith said backing in boidal blade, a handle adapted to be screwed on said bolt, a guard for said blade, and of rhomboidal outline shape, a perforated portion on said guard covering the operative blade edge and being slightly curved towards said handle, and another portion of said guard covering the inoperative blade edge and being slightly curved away from said handle, whereby the blade in the vicinity of said inoperative blade edge is slightly bent when clamped between guard and backing, a raised portion on said guard, an opening in said raised portion and positioned so as to receive said bent screw bolt of said backing, said raised portion of said guard being adapted to form an abut- 

